assertively

from WordNet (r) 3.0 (2006)

assertively
    adv 1: in an assertive manner; "`I will take care of my own
           life,' she said assertively" [ant: {unassertively}]

from The Collaborative International Dictionary of English v.0.48

Assertive \As*sert"ive\, a.
   Positive; affirming confidently; affirmative; peremptory.
   [1913 Webster]

         In a confident and assertive form.       --Glanvill.
   [1913 Webster] {As*sert"ive*ly}, adv. -- {As*sert"ive*ness},
   n.
   [1913 Webster]